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                佛罗里达                </h1>
                <p>时间限制：30s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：512MB</p>			</div>
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                                <h3>题目描述</h3><p><div>没有得到激光武器的苏联十分生气，他们决定派遣一支特种部队强行</div>
<div>登陆美国并造成一定的袭击。 Reddington 得到的情报是他们将在佛罗里达</div>
<div>海岸登陆，他决定派遣他的手下去阻击他们。可惜的是， Reddington 由于</div>
<div>不听从总统的意见，手中的部队只剩下了 N 个人。人与人之间会有一定的</div>
<div>矛盾值，第 i 个人与第 j 个人的矛盾值为 Ti,j，并且有 Ti,i = 0， Ti,j = Tj,i。</div>
<div>Reddington 希望将这 N 个人分为两支小分队，记为 A, B，每个人要么属</div>
<div>于分队 A 要么属于分队 B。对于一支小分队 S，其内部的不安值</div>
<div><img src="../file/4670_0.png" width="235" height="78" alt="" /></div>
<div>显然的，假如一支分队的不安值很高，那么作战能力就会很差。现在</div>
<div>给定你 N 以及一个 N &lowast; N 的矩阵 T，你需要告诉 Reddington，最小的</div>
<div>D(A) + D(B) 是多少。</div>
<div></div>
<p></p></p><hr/><h3>输入格式</h3><p><div>输入包括多组数据。</div>
<div>对于每组数据：</div>
<div>第一行一个整数 N。</div>
<div>接下来 N &minus;1 行，第 i 行读入 N &minus;i 个数，第 i 行第 j 个数表示 Ti,i+j。</div>
<div>2 &le; N &le; 250, 0 &le; Ti,j &le; 109，数据组数不超过 2 组</div>
<div></div>
<div></div>
<p></p></p><hr/><h3>输出格式</h3><p><div>一行，最小的 D(A) + D(B) 是多少</div>
<div></div>
<p></p></p><hr/><h3>样例输入</h3><pre>5
4 5 0 2
1 3 7
2 0
4</pre><hr/><h3>样例输出</h3><pre>4
//一种最优方案为： A = {1, 2, 4}, B = {3, 5}，此时 D(A) = 4, D(B) =0</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>没有写明来源</p>
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